REVIEWS 199 



methods of refining zinc and lead, and the manufacture of wrought iron 

 and steel are fully treated. The writer's style is clear, concise, and enter- 

 taining. For a text introducing the subject to the student or to the mining 

 geologist it is the best work which has come before the reviewer's notice. 

 Its usefulness would be greatly increased, however, if it contained a 

 bibliography. W. H. E. 



Elements of Mineralogy, Crystallography and Blowpipe Analysis 

 from a Practiral Standpomt. Including a Description of All 

 Common or Useful Minerals, the Tests Necessary for Their 

 Identification, the Recognition and Measurement of Their 

 Crystals, and a Concise Statement of Their Uses in the Arts. 

 By Alfred J. Moses, E.M., Ph.D., Professor of Mineralogy, 

 Columbia University, New York City, and Charles Lathrop 

 Parsons, B. S., Professor of General and Analytical Chemistry, 

 New Hampshire College, Durham, N. H. 4th ed. Pp. 448 

 and 583 figures. New York: D. Van Nostrand Company, 

 1909. $2.50. 



In the fourth edition of this useful work some of the material has been 

 rearranged and the statistical data revised. The tables, with some addi- 

 tions, are essentially as in the previous editions. The book now includes 

 an elementary course in crystallography in which the study of the photo- 

 graphs of actual crystals is utilized with the drawings of geometrical models 

 of crystal. The course in blowpipe analysis and the tables placed at the 

 end of the book are concise and reasonably comprehensive. The section 

 on descriptive mineralogy includes much valuable data on the occurrence, 

 origin, and uses of minerals. W. H. E. 



Geology of Morgan County. By C. F. Marbut. Missouri Bureau 

 of Geology and Mines. Vol. VII, 2d series. 

 This county lies in southwestern Missouri, on the edge of the Ozark 

 uplift. The chief rocks of the county are cherty, magnesian limestones, 

 with thin bands of sandstone, Cambrian to Mississippian in age, with some 

 Pennsylvanian shales and sandstones locally preserved. Fossils are not 

 abundant and none have been described in this report. Lead, zinc, iron, 

 barite, clay, and coal occur, and have been mined, but only the last three 

 are mined at present. E. R. L. 



